Super HD is a funny term. HD is either 720p, 1080i, or 1080p. I guess by "Super HD" he means 1080p? I don't really think it makes any difference when streaming because your source (app, ISP, etc) will determine how good the pq quality ultimaely is.
The blu-ray player has to have internet capabilities, either wirelessly (built-in or with the use of a dongle) or wired (ethernet). If it's a cheapie Magnavox as you say it probably doesn't have internet capabilities. A lot of newer blu-ray players are internet capable (and they don't cost a lot of money) and come with a suite of internet apps which usually has Netflix. The robustness of the Netflix app is dependent upon the player's mfr etc. For example, I have a very nice Panasonic blu-ray player but the Netflix app is no where near as fast and easy to navigate as the AppleTV2 one is. So I rarely use the apps on my blu-ray player. Both of my devices are wired so I don't need to use WiFi for a connection.
If your laptop doesn't have an HDMI out or equivalent connection, then you will need to use some sort of adapter but without knowing what outputs you have, video card, or even model of laptop, it's difficult to recommend what kind of cable you'll need.
Your Viera doesn't need anything else if you have it connected to the internet either wired (ethernet) or wirelessly (WiFI). Just launch the Netflix app and enter you account information. That's all you need.